A comparative chromosome study on five Minnow fishes (Cyprinidae, Cypriniformes) in Thailand


  • Weerayuth Supiwong Faculty of Applied Science and Engineering, Khon Kaen University, Nong Khai Campus, Muang District, Nong Khai Province 43000
  • Surachest Aiumsumang
  • Sumalee Phimphan
  • Chatmongkon Suwannapoom
  • Alongklod Tanomtong




Karyotype, Minnow, Fish chromosome, Cyprinid fishes, Minnow fishes.


The cytogenetic comparisons of five Minnow species from Thailand were presented here, i.e. Devario regina, D. laoensis, Rasbora paviana, R. aurotaenia and Esomus metalicus. The mitotic chromosome preparation was prepared directly from renal cells. Conventional staining and Ag-NOR banding techniques were applied to stain the chromosomes. The results revealed that all Minnow fishes studied possessed the same diploid chromosome number (2n) as 50 chromosomes. The fundamental number (NF) are as 100, 100, 98, 98 and 98 in D. laoensis, D. regina, R. paviana, R. aurotaenia and E. metalicus, respectively. Their karyotypes composing of metacentrics- submetacentrics- acrocentrics- telocentrics were as follows: 6-12-32-0 in D. regina, 6-10-34-0 in D. laoensis, 8-16-24-2 in R. paviana, 8-16-24-2 in R. aurotaenia and 8-10-30-2 in E. metalicus. The Ag-NOR banding technique provides the nucleolar organizer regions (NORs) at subtelomeric region of the short arm chromosome in the submetacentric or acrocentric chromosomes that there are differences in the chromosome pairs among species.


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How to Cite

Supiwong, W., Aiumsumang, S., Phimphan, S., Suwannapoom, C., & Tanomtong, A. . (2021). A comparative chromosome study on five Minnow fishes (Cyprinidae, Cypriniformes) in Thailand. Caryologia. International Journal of Cytology, Cytosystematics and Cytogenetics. https://doi.org/10.36253/caryologia-1017